linux-kernel - Re: [PATCH] riscv: Enable interrupt during exception handling

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Message-ID: <alpine.DEB.2.21.2506240303170.61655@angie.orcam.me.uk>
Date: Tue, 24 Jun 2025 03:09:14 +0100 (BST)
From: "Maciej W. Rozycki" <macro@...am.me.uk>
To: Palmer Dabbelt <palmer@...belt.com>
cc: namcao@...utronix.de, Paul Walmsley <paul.walmsley@...ive.com>, 
    aou@...s.berkeley.edu, Alexandre Ghiti <alex@...ti.fr>, 
    bigeasy@...utronix.de, clrkwllms@...nel.org, rostedt@...dmis.org, 
    linux-rt-devel@...ts.linux.dev, linux-riscv@...ts.infradead.org, 
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: Enable interrupt during exception handling

On Mon, 23 Jun 2025, Palmer Dabbelt wrote:

> I'm kind of split on a Fixes tag here.  One could argue it's a regression, as
> having interrupts disabled during exceptions is going to cause all sorts of
> performance issues for users.  Seems a bit risk to just backport, though...
> 
> That said, if nobody noticed then it's probably a good sign nobody is really
> paying attention and we should just backport it before anyone notices...

 Oh, someone did notice and it's not only performance, cf. 
<https://lore.kernel.org/r/alpine.DEB.2.21.2501070143250.18889@angie.orcam.me.uk/>.

  Maciej